Compatibility:
Currently not supported by any browser
Version: Level 2Inherited: No

The outline-color property sets the color of the outline.

An outline is a line drawn around an element with the purpose of making that element
stand out (i.e., become more noticeable on a page).
You can set the color, style, and width of the line.
The outline is drawn outside of the border edge of the element.
Therefore, an element can have both a border and an outline.
Unlike a border, an outline does not have to have a rectangular shape.

color

The color value can be the keyword color name, the hex
six-digit number (#FFFFFF), or the RGB three-digit value (255,255,255).
There are sixteen standard colors in HTML:

aqua

navy

black

olive

blue

purple

fuchsia

red

gray

silver

green

teal

lime

white

maroon

yellow

invert

The invert value performs a color inversion on the background color and uses the
inverted color for the outline.
This insures that the outline color will stand out from the background.